This thesis explores the accuracy of numerical simulations of vortex flow meters using an open-source software. Mesh of a vortex flowmeter with a specially designed bluff body was created with Salome-Meca and numerical simulations were performed with the OpenFOAM code. Simulations were carried out for different Reynolds numbers ranging from 5000 to 50000. Results were then compared to the experimental data at the same Reynolds numbers. The main goal of the study is to accurately predict the vortex shedding frequency and to demonstrate its linear dependency on the mass flow rate. Flow simulations were performed using different simulation techniques such as Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Unsteady Reynolds Averaged Navier Stokes (URANS). However, at higher Reynolds numbers both DNS and LES simulations are computationally too demanding so only URANS was used at Re above 35000.
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